|Publication number||US5549233 A|
|Application number||US 08/370,779|
|Publication date||Aug 27, 1996|
|Filing date||Dec 23, 1994|
|Priority date||Jan 29, 1993|
|Publication number||08370779, 370779, US 5549233 A, US 5549233A, US-A-5549233, US5549233 A, US5549233A|
|Inventors||Donald E. Clauser|
|Original Assignee||C. Joyce Witt|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (54), Referenced by (58), Classifications (10), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This is a continuation of copending application Ser. No. 08/010,759 filed on Jan. 29, 1993, now abandoned.
This application is related to application Ser. No. 819,766, filed Jan. 13, 1992, which is a continuation of application Ser. No. 634,923, filed Dec. 21, 1990, now U.S. Pat. No. 5,079,901, which was a continuation of application Ser. No. 348,860, filed May 8, 1989, now abandoned and also related to application Ser. No. 582,331, filed Sep. 13, 1990. The disclosures of each of these applications are incorporated herein by reference.
This invention relates generally to apparatus and methods for inserting coupons into containers moving along a high volume handling system, and more particularly, the invention relates to coupon inserting apparatus and methods for feeding coupons provided in a continuous web in a first mode of operation and for separating the forwardmost coupon from the continuous web in a second mode of operation. The coupons may embody various sizes and shapes to be processed at relatively high speeds.
As noted in the introductory portion of the specification of the aforesaid related applications, it is desirable to position coupons into passing containers in various commercial processing applications. In this way, for example, promotional materials such as discount coupons or prizes may be packaged with food or other items. Accordingly, the term "coupon" is used herein to include any type of insert, coupon, card, sheet, receipt, warranty, premium, and additionally, other three-dimensional novelty items that can be advantageously handled in accordance with the invention described hereinafter. Similarly, the term "container" is used in the broadest possible context to include containers such as boxes, tubs, cans and vessels of all kinds as well as other coupon receiving means which can be advantageously used with the present invention.
Heretofore, coupon dispensing systems in commercial settings have commonly required a stack of pre-cut coupons that are individually dispensed from a downwardly sloping channel, such as is shown in U.S. Pat. No. 4,530,200. In that system, pusher elements and advancing rollers coact to withdraw the forward most coupon from a pre-cut stack of coupons. The coupon is drawn into the downwardly sloping channel to a dispensing location. In other arrangements, for example in U.S. Pat. No. 4,179,113, a reciprocal vacuum head dispenses each coupon from a stack of pre-cut coupons and places the coupons in a conveyor system which transports the coupons to containers passing thereby.
The aforementioned related applications also disclose apparatus and methods for inserting coupons into moving containers. These applications disclose inserter machines that utilize a burster technique for separating a forwardmost coupon from a continuous web of coupons in timed relationship with a target container so that the forwardmost coupon is injected into the container. These machines are readily operable for successive insertion of coupons to accommodate various line processing speeds of the moving containers. In addition, such machines are relatively compact, and therefore may be readily placed at a plurality of locations along an integrated processing line without additional clutter, and are also readily transportable. Thus, such machines offer significant advantages, both in diminished real estate requirements, and in reliability in operation. However, such configurations are incapable of reliably processing coupons at insertion rates in excess of 300 coupons per minute. Likewise, such machines fail to provide adequate flexibility for handling three-dimensional and other specialty inserts.
Thus, the prior art coupon inserting systems now offer unsatisfactory performance, particularly in high speed commercial and other specialized applications. Likewise, they provide some degree of inflexibility. Accordingly, a principle object of the present invention is to generally overcome deficiencies of the prior art.
More particularly, it is an object of the present invention to provide improved performance in a coupon inserting system used in a materials handling line.
It is a more particular object of the present invention to provide a commercial quality coupon inserting system that adequately addresses high speed application requirements.
It is yet a further object of the present invention to provide improved insertion reliability, while at the same time, providing handling capability for three-dimensional and other novelty items, in a commercial setting.
The present invention provides these and other additional objects through an improved coupon inserter assembly that separates the forwardmost coupon from a continuous web and thereafter passes the coupon to a burst or dispensing location so that it may be injected into a container. The present invention further provides a method for using the same invention to achieve the desired result. Structurally, a preferred embodiment of the present invention comprises opposed feed rolls and opposed burst rolls located downstream from the feed rolls. The feed rolls operate, in a controlled fashion, to receive coupons from a continuous web and to advance the coupons to a burst location where the burst rolls engage the forwardmost coupon and a separable portion between the forwardmost coupon and the next succeeding coupon is positioned between the feed rolls and the burst rolls. In operation, the feed rolls move the forwardmost coupon into a nip formed by the burst rolls. The burst rolls engage the forwardmost coupon and in a burst operation, apply a separating tension along the separable portion while the web is engaged between the feed rolls.
A novel power delivery arrangement for rotating the feed rolls and the burst rolls includes a first controllable drive source that transmits torque to the feed rolls and, in a first mode of operation, the burst rolls. In this mode, the feed rolls and the burst rolls both rotate at the same tangential velocity to advance the web. In a second mode of operation, the first drive source is disengaged from the burst rolls. In this mode, a constant speed drive source is coupled to the burst rolls for rotating the burst rolls at a tangential velocity greater than that of the feed rolls such that the forwardmost coupon is separated from the next succeeding coupon.
A burst operation is based on receipt of a timing signal by control and timing circuitry, This timing signal is typically developed from a production line and is indicative of the movement of the containers to the dispensing location so that the coupons may be inserted into the containers as they pass thereby. In response, the control circuitry provides a control signal disengaging the burst rolls from the first drive source and for engaging the burst rolls with the second drive source to separate the forwardmost coupon. This timing signal may also be employed to control actuation of the first drive source. In addition, the first drive source is controlled in response to a coupon sensing signal developed from a location between the feed rolls and the burst rolls. A coupon sensor senses the lead edge of a next succeeding coupon upon completion of a burst operation and provides a sensing signal to control and timing circuitry. After separating the forwardmost coupon, the next succeeding coupon is delivered to the pre-dispense location.
The above described and additional objects and features of the present invention may be further understood by reference to the following detailed description of the preferred embodiment, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of an illustrative embodiment of an apparatus embodying the principles of this invention;
FIG. 2 is a side view of the coupon inserter assembly of FIG. 1 with portions removed for clarity;
FIG. 3 is an additional side view of the coupon inserter of FIG. 1;
FIG. 4 is an end view of the coupon inserter assembly of FIGS. 1-3, looking from the output of the assembly;
FIG. 5 is a simplified block diagram illustrating suitable control circuitry for the coupon inserter assembly of FIG. 1; and
FIG. 6 is a flow chart illustrating a control sequence performed by the control circuitry of FIG. 5.
It should be understood that the drawings are not necessarily to scale and that in certain instances, details which are not necessary for an understanding of the present invention or which render other details difficult to perceive have been omitted.
While the invention will be described in connection with illustrative embodiments, it will be understood that they are not intended to limit the scope of the invention. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the scope of the invention as defined by the appended claims.
Generally, the present invention provides an improved coupon inserter assembly for accommodating various sizes and shapes of coupons at a relatively high insertion rate. A device according to the present invention receives a continuous web of coupons and, upon the receipt of a signal, moves the forwardmost coupon in a controlled fashion in a feeding operation. In a bursting operation, the device separates the forwardmost coupon away from the continuous web, and dispenses the forwardmost coupon at a selected time into a rapidly moving container as it passes a dispensing location. The device of this invention is intended to be integrated into a full service processing system, and typically supplies successive coupons into the containers at a processing stage where the containers have been formed, may or may not yet be filled, and have not yet been closed. By way of example, the device of this invention may be adapted to supply coupons to bags of snack food containers, cereal boxes, bread sacks, or any other container using the teachings described herein. In addition, the invention may be used to supply seasoning pouches, condiments and other samples to the containers.
FIG. 1 illustrates a coupon inserter assembly 10 according to this invention. The coupon inserter assembly 10 includes a housing 12 comprising a first removable housing module 12a and a second removable housing module 12b, each mounted in stacked relation with respect to a third housing module 12c for ready interchangeability of various of the componentry in the inserter assembly 10, as described in greater detail below. The inserter housing 12 may be mounted on a pedestal (not shown) adapted for pivotal and/or rotational movement to locate the coupon inserter assembly 10 in a desired orientation, such as, toward a processing line spaced proximate to a stream of moving containers. The containers are typically provided along a conveyor system or other handling system as would be understood by those skilled in the art.
A continuous web supply 14 of coupons may be packaged in a continuous circular reel, which is rotatably attached via a support 16 (see FIG. 2) proximate the inserter assembly 10. The web supply may also be provided in a fan-folded or a traverse fan-folded format as will be understood by those skilled in the art. It is contemplated that the invention may be utilized in conjunction with any number of coupon types. As an example, the web supply may be a continuous supply of paperboard or cardboard coupons physically connected to each other but separated by perforations or otherwise separated by weakened web portions which extends transversely of the web. In addition, the web supply may be a packaged premium wherein small prizes or the like are contained in plastic wrappers or pouches that are successively connected together by separable portions.
The coupon inserter assembly 10 preferably includes opposed tensioning rolls 18 and 20 rotatably mounted to a fourth removable housing module 12d. Tensioning roll 18 is an idler roll. Tensioning roll 20 is preferably connected to an adjustable resistance device of the type known to those skilled in the art thus providing tension between tensioning rolls 18 and 20 to insure uniformity in the web. The web supply is passed initially from the reel between tensioning rolls 18 and 20 and a feed roll subassembly (described below) to insure uniformity in the web and to minimize bending or folding of the web during further processing operations, as described below. Inasmuch as the housing module 12d is easily removed, the tensioning rolls 18 and 20 may optionally be removed for particular applications.
FIGS. 1 through 3 illustrate a feed roll subassembly 21 including an upper feed roll arrangement 22 and a lower feed roll 24 rotatably mounted to the second removable housing module 12b. As best seen in FIG. 1, the upper feed roll arrangement 22 comprises a first upper feed roll 26 and a second upper feed roll 28 axially spaced from upper feed roll 26. The upper feed rolls 26 and 28 are rotatably mounted to the housing module 12a via opposed shafts shown as threaded shafts 30 and 32, respectively and are freely rotatable relative to the housing module 12a. The threaded shafts 30 and 32 are received within complemental threaded housing blocks 31. This configuration enables relative axial adjustment between the upper feed rolls 26 and 28. On the other hand, the lower feed roll 24 is a driven via a drive shaft 25 (see FIGS. 2-3) and substantially traverses, and in most applications extends beyond, the width of coupons to be processed. The feed roll subassembly 21 operates in a controlled fashion to receive the coupon supply 14 in a nip formed between upper feed roll 26 and lower feed roll 24 and also between upper feed roll 28 and lower feed roll 24.
Inasmuch as the axial spacing of upper feed rolls 26 and 28 is readily adjustable, a coupon having a raised center portion and lateral sides which may be substantially flattened, such as prizes and the like contained in a wrapper, may be handled by engagement of the side portions of the coupon in the nip formed between the upper feed roll 26 and lower feed roll 24 on one side of the coupon and also between the upper feed roll 28 and the lower feed roll 24 on the opposed side of the coupon, as shown in FIG. 1. In this manner, small prizes or other three-dimensional premiums may be handled. Alternatively, the upper feed rolls 26 and 28 may be oriented in close axial spaced relation for handling substantially flat pieces.
In addition, the vertical spacing between upper feed rolls 26 and 28 and the lower feed roll 24 is also adjustable. As shown in FIG. 1, a pair of adjustment screws 31a are utilized to adjust the housing blocks 31 to thereby adjust the relative spacing between the upper and lower feed rolls.
FIGS. 1 through 4 also show a burst roll subassembly 34 including an upper burst roll arrangement 36 and a lower burst roll 38 that substantially traverses the coupon path. The lower burst roll 38 is mounted to housing module 12b and driven via drive shaft 39. In a first operating mode, the lower burst roll 38 is driven at an angular speed that is substantially the same as the lower feed roll 24. In a second operating mode, the burst roll 38 is driven at a substantially greater angular speed than the speed of feed roll 24 so that the forwardmost coupon is separated from the next succeeding coupon and passed, via rotation of the burst rolls, to a dispensing location. As best seen in FIG. 4, the upper burst roll arrangement 36 comprises a first upper burst roll 40 and a second upper burst roll 42 axially spaced from upper burst roll 40.
As with the upper feed rolls 26 and 28, the upper burst rolls 40 and 42 are rotatably mounted to the housing module 12a via adjustable threaded shafts 44 and 46, respectively. The threaded shafts, in turn, are received within threaded housing blocks 45. In this way, the relative axial placement of the upper feed rolls may also be readily adjusted to accommodate coupons having raised central portions. The vertical spacing between upper burst rolls 40 and 42 and lower burst roll 38 is also adjusted via adjustment screws 45a, which are coupled with housing blocks 45.
FIGS. 2 through 4 also show a photoelectric sensor 48 positioned relative to a coupon dispensing location between the feed roll subassembly 21 and the burst roll subassembly 34. As described in greater detail below, the leading edge of a coupon intercepts the light beam emitted by the photoelectric sensor (denoted by an arrow 50). In response, the photoelectric sensor 48 provides a sensing signal indicative of the detection of a coupon registered between the feed roll subassembly 21 and the burst roll subassembly 34.
The novel arrangement used to actuate the feed roll subassembly 21 and the burst roll subassembly 34 is best seen in conjunction with FIGS. 2 through 5. As shown in FIG. 2, a first drive source shown as a stepper motor 52 transmits torque via an output shaft 54 to a primary pulley 56. In the preferred embodiment, stepper motor 52 is a precisely controllable five phase stepper motor, Type PH599H-NAA(BA), manufactured by Oriental used in conjunction with a stepper motor driver, Type UDX5128NA, also manufactured by Oriental. An elastomeric belt 58 connects the primary pulley 56 to a secondary pulley 60 to transmit torque to the lower feed roll drive shaft 25. As best seen in FIG. 3, an elastomeric belt 62 connects the lower feed roll drive shaft 25 with the lower burst roll drive shaft 39 via pulleys 64 and 66.
As best seen in FIG. 4, an overrunning clutch 68 is also coupled to the burst roll drive shaft 39. By way of example, a wrap spring clutch, such as a PSI-2 series, manufactured by Warner is suitable for use as overrunning clutch 68. In a feed operation, the overrunning clutch 68 is engaged so that the stepper motor 52 transmits torque to the burst roll drive shaft 39 via belt 58 and via pulleys 56 and 60 and also via belt 62 and pulleys 64 and 66 (see FIGS. 2 and 3). The overrunning clutch 68 disengages during a burst operation to permit the burst roll drive shaft to be driven by a second source, as described in greater detail below.
As shown in FIG. 3, a constant high-speed electric motor 70 transmits torque via an output shaft 72 to a primary pulley 74. An elastomeric belt 76 couples the primary pulley 74 to a secondary pulley 78. As best seen in FIG. 4, the secondary pulley 78 transmits torque to an input shaft 80 of an electronic clutch 82. Preferably, clutch 82 is a radial electric wrap spring clutch, such as a Type EC75, manufactured by Reel Precision Mfg. Co.. To perform a burst operation, the electronic clutch is engaged for transmitting torque via a clutch output shaft 84 from the constant high-speed motor 70 to a pulley 86. An elastomeric belt 88 couples the clutch output to the lower burst roll shaft 39, via pulley 90. Such action disengages the overrunning clutch 68 to decouple the stepper motor 52 and lower burst roll shaft 39.
FIG. 5 illustrates one specific control system that may be utilized in practicing this invention. The electrical circuitry described hereinafter is typically located in a housing module remote from the inserter assembly and protected by suitable isolation circuitry, as will be understood by those skilled in the art. As shown in FIG. 5, an electronic controller 90 receives a coupon dispense signal on a line 94, a coupon detect signal on a line 96, an operation mode signal on a line 98, and optionally, an insert verification signal on a line 99. In addition, the electronic controller 90 receives a coupon length preset signal on a line 101, a coupon dispense delay preset signal on a line 103, and optionally, a total count signal from a counter 105 on a line 107. In the preferred embodiment, electronic controller 90 is a programmable logic controller, Type KV24, manufactured by Keyence. The electronic controller 92 operates in a logical fashion to provide a variable frequency pulse signal on a line 100 and a clutch control signal on a line 102.
The dispense signal supplied on line 94, the coupon length preset signal on line 101, and the dispense delay preset signal on line 103 are processed to determine the appropriate time to initiate a burst operation. The dispense signal on line 94 may be supplied from any number of external sources including existing product line control, a photoelectric sensor arrangement for detecting passing containers, proximity detection, an encoder scheme or any other suitable source. Likewise, this signal may be used by the controller 92 to determine the rate at which to feed the coupons during a feed operation. As noted above, the coupon detect signal on line 96 is generated by the photosensor 48 to register the position of the leading edge of the web. The mode signal on line 98 selects one of at least two available operating modes, namely a continuous feed mode where the feed rolls advance the web in a continuous fashion and an intermittent feed mode where the feed rolls accelerate and decelerate the web. The insert verification signal on line 99 may optionally be employed to verify that the forwardmost coupon has been successfully delivered to its target. This signal may be based on photocell detection of an exiting coupon or even on a sonic sensor which detects arrival of a coupon within a container.
In the preferred embodiment, the signal supplied by preset counter 105 on line 101 corresponds to the number of coupons contained in the web. The controller 92 may also supply a signal to decrement the preset counter 105 on a line 109 upon the execution of a burst sequence. In addition, the controller 92 may supply an output signal to a counter 111 on a line 113 to indicate the total number of delivered coupons.
The signal on line 100 is a variable frequency signal that is passed to a frequency-to-analog converter 104. The frequency-to-analog converter 104 converts the signal received on line 100 to a voltage output signal on a line 106. This output voltage signal is supplied via an RC network 108 to an analog-to-frequency converter 100 on a line 112. The output of the analog-to-frequency converter 110 is supplied on a line 114 to the input of stepper motor 52. This is the signal which controls the rotation of stepper motor output shaft 54 and hence the rotation of the feed roll subassembly 21. Likewise, in a first mode of operation, this signal controls rotation of the burst roll drive shaft 39 and the burst roll subassembly. While the present best mode for practicing the invention contemplates use of frequency to analog and analog to frequency conversion for generating output pulses for controlling the stepper motor 52 due to the variable frequency output limitations of electronic controller 90, it should be understood that such conversion would not necessarily be required where a controller with greater frequency output range is utilized, or where a stepper motor with lower driving pulse requirements is used. Likewise, the use of an RC network to insure that the output pulses supplied to the stepper motor are ramped to a desired frequency is specific to this particular implementation of the invention.
A clutch control signal on a line 102 regulates the torque transfer from the clutch input 80 shaft to the output shaft 84. Accordingly, when the controller 90 provides a clutch control signal on line 102 to engage the clutch 82, such as for performing a burst operation, the constant motor 70 transmits torque to the lower burst roll 38 via drive shaft 39. Otherwise, the clutch 82 is disengaged.
FIG. 6 is a logical flow chart for system operation of a coupon inserter assembly according to the present invention. As shown, the system begins at a start block 200 wherein the forwardmost coupon is located in a burst position, that is, the forwardmost coupon is engaged in the nip formed between the burst rolls with the weakened web portion separating the forwardmost coupon and the next succeeding coupon located between the feed rolls and the burst rolls. The system then advances to a next block 202 at which initial conditions are set. Specifically, the system initializes parameters for motion and timing calculations for delivery of a coupon of a specific length at a desired rate, and monitoring of system inputs and outputs. The system may also receive an input signal from the photosensor 48 to verify that the forwardmost coupon is located in the burst position described above. At block 202, the system also selects an appropriate operational mode, i.e., either a continuous feed mode or a start-stop feed mode. In a continuous feed mode, the system operates to advance the string of coupons in a continuous fashion during both a feed operation and a burst operation. During a startstop mode, the string of coupons is intermittently supplied depending on the production line speed.
At a next block 204, the system receives the input signal to dispense the forwardmost coupon into a target container. The system thereafter processes this signal at a block 206 and determines the appropriate time for dispensing the forwardmost coupon into the container. The system thereafter provides an output signal to engage the electronic clutch 82 (see FIG. 5) at a block 208. The electronic clutch is engaged for a preselected time interval to couple the high-speed constant motor with the burst roll drive shaft and thereby rotate the burst rolls at an increased angular velocity. During this operation, the burst rolls rotate at a tangential velocity greater than the tangential velocity of the feed rolls and the velocity of the web. Accordingly, a bursting tension will develop in the separable web portion between the forwardmost coupon and the next succeeding coupon upon engagement of the constant speed drive. In this way, the forwardmost coupon separates from the web and exits the assembly at a velocity determined by the tangential speed of the burst rolls.
After a preselected delay, the system advances to a block 210 and initiates, or in the case of a continuous operational mode continues, feeding of the web at a rate determined by the operational mode selected and the production line speed. The feed rate is based on the number of pulses output to the stepper motor 52. The system thereafter advances to a next block 212 where it obtains an input signal from photosensor 48 (see FIG. 5). At a decision block 214, the system determines whether the forwardmost coupon has exited the burst rolls. If no, the system advances to a block 216 and takes appropriate corrective action. If yes, the system advances to a next block 218.
At block 218, the system again obtains an input signal from the photosensor 48 indicative of arrival of the leading edge of the web. The system then advances to a block 220 and meters advancement of the web. In particular, the system supplies a selected number of output pulses to the stepper motor 52 required to position the forwardmost coupon at the burst location at a time when a burst operation will be performed.
The system then advances to a decision block 222 and determines whether a dispense signal is received. If yes, the system then branches back to the Initiate Burst Cycle block 206 and repeats. If no, the system branches to the Initialize and Standby block 202 after the selected coupon length is metered.
In an alternative embodiment according to the present invention for actuating the feed rolls and the burst rolls, an electric clutch/brake arrangement is employed in place of the stepper motor 52 in the embodiment described above. In this embodiment, the output of constant electric motor 70 is connected to the input of the clutch brake and the lower feed roll drive shaft is connected to the output of the clutch brake via appropriate coupling. The remaining mechanical couplings described above remain the same.
The electronic controller 92 is likewise electrically coupled to the clutch/brake arrangement and provides a first command signal thereto for engaging the clutch so that torque is transferred between the constant speed motor and the feed roll drive shaft. In addition, the electronic controller provides a second command signal to the clutch/brake arrangement to engage the electric brake for decoupling the constant speed electric from the feed roll drive shaft. Accordingly, during a feed operation, the controller 92 provides a command signal, at an appropriate time, for engaging the clutch and disengaging the brake of the clutch/brake for rotating the feed rolls at a constant rate. In this mode, the burst rolls are likewise rotated at the same constant rate as described above. Thus, the feed rolls and the burst rolls cooperate to feed the forwardmost coupon to the predispense position. In a burst operation, the controller provides a signal for engaging the brake and for disengaging the clutch of the clutch/brake to stop rotation of the feed rolls. Since the burst rolls are coupled with the constant electric motor 70 via electric clutch 82, engagement of clutch 82 provides torque transfer to rotate the burst rolls and separate the forwardmost coupon from the remainder of the web.
As noted above, the upper feed roll and upper burst roll arrangements are mounted to removable housing module 12a, while the lower feed rolls and burst rolls are mounted to removable housing module 12b. Thus, the particular feed roll and burst roll configurations may be readily modified depending on the particular application simply by interchanging the housing modules 12a-b. Similarly, the tensioning rolls 18 and 20 may be readily removed by removing the housing module 12d.
As set forth above, an improved high speed coupon inserter system and method of using the same has been described. Various interconnections and modifications as would be apparent to one of ordinary skilled in the art and familiar with the teaching of this application are deemed to be within the scope of this invention. For example, rather than comparing the train of output pulses supplied to the stepper motor with a known number of pulses, as shown in decision block 210 of FIG. 6, the system could also set a timer for the time at which a burst operation occurs. Likewise, those skilled in the art will appreciate that an output accelerator or other coupon delivery arrangement, such as one disclosed in the aforesaid applications, may be used to receive the separated coupons and deliver the separated coupons to containers at a selected speed. Thus, the precise scope of the invention is set forth in the appended claims, which are made, by reference, a part of this disclosure.
Various advantages flow readily from the disclosed inserter designed and corresponding method of using the same. For example, the above described feeding and bursting operations may be repeated in a continuous fashion to provide a dramatic increase in the coupon insertion rate and to achieve better overall efficiency in the same commercial environment. That is, where a previous system may employ slower coupon handling speeds and accompanying production line speeds, the present invention can provide that same coverage, in reduced time. Further, the novel feed roller and burst roller structure for processing the coupons enables use of various three dimensional configurations.
Accordingly, both the structure and the method of using the present invention provides significant improvements over the prior art, improvements that are manifested both in increased performance and diminished cost.
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|U.S. Classification||225/100, 225/106|
|Cooperative Classification||Y10T225/35, B65H2513/51, B65H2403/21, B65H35/10, B65H2511/20, Y10T225/393|
|Feb 24, 2000||FPAY||Fee payment|
Year of fee payment: 4
|Feb 18, 2004||FPAY||Fee payment|
Year of fee payment: 8
|Feb 27, 2008||FPAY||Fee payment|
Year of fee payment: 12
|Mar 3, 2008||REMI||Maintenance fee reminder mailed|